package com.channel.modules.system.rest;

import cn.hutool.core.collection.CollectionUtil;
import com.channel.modules.system.domain.Menu;
import com.channel.modules.system.domain.vo.MenuVo;
import com.channel.modules.system.service.MenuService;
import com.channel.modules.system.service.dto.MenuDto;
import com.channel.modules.system.service.dto.MenuQueryCriteria;
import com.channel.modules.system.service.mapstruct.MenuMapper;
import com.commons.exception.BadRequestException;
import com.commons.utils.PageResult;
import com.commons.utils.PageUtil;
import com.commons.utils.SecurityUtils;
import dj.framework.annotation.Log;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletResponse;
import java.util.*;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/api/menus")
public class MenuController {

    private final MenuService menuService;
    private final MenuMapper menuMapper;
    private static final String ENTITY_NAME = "menu";

    @Autowired
    public MenuController(MenuService menuService, MenuMapper menuMapper) {
        this.menuService = menuService;
        this.menuMapper = menuMapper;
    }

    @GetMapping("/download")
    @PreAuthorize("@el.check('menu:list')")
    public void exportMenu(HttpServletResponse response, MenuQueryCriteria criteria) throws Exception {
        menuService.download(menuService.queryAll(criteria,false),response);
    }

    @GetMapping(value = "build")
    public ResponseEntity<List<MenuVo>> buildMenus(){
        List<MenuDto> menuDtoList = menuService.findByUser(SecurityUtils.getCurrentUserId());
        List<MenuDto> menus = menuService.buildTree(menuDtoList);
        return new ResponseEntity<>(menuService.buildMenus(menus), HttpStatus.OK);

    }

    @GetMapping(value = "/lazy")
    @PreAuthorize("@el.check('menu:list','roles:list')")
    public ResponseEntity<List<MenuDto>> queryAllMenu(@RequestParam Long Pid){
        return new ResponseEntity<>(menuService.getMenus(Pid),HttpStatus.OK);
    }

    @GetMapping(value = "/child")
    @PreAuthorize("@el.check('menu:list','roles:list')")
    public ResponseEntity<Object> childMenu(@RequestParam  Long id){
        Set<Menu> menuSet=new HashSet<>();
        List<MenuDto> menusList = menuService.getMenus(id);
        menuSet.add(menuService.findOne(id));
        menuSet=menuService.getChildMenus(menuMapper.toEntity(menusList),menuSet);
        Set<Long> ids = menuSet.stream().map(Menu::getId).collect(Collectors.toSet());
        return new ResponseEntity<>(ids,HttpStatus.OK);
    }

    @GetMapping
    @PreAuthorize("@el.check('menu:list')")
    public ResponseEntity<PageResult<MenuDto>> queryMenu(MenuQueryCriteria criteria) throws Exception{
        List<MenuDto> menuDtoList = menuService.queryAll(criteria, true);
        return new ResponseEntity<>(PageUtil.toPage(menuDtoList,menuDtoList.size()),HttpStatus.OK);
    }

    //查询菜单:根据ID获取同级与上级数据
    @PostMapping("/superior")
    @PreAuthorize("@el.check('menu:list')")
    public ResponseEntity<List<MenuDto>> getMenuSuperior(@RequestBody List<Long> ids){
        Set<MenuDto> menuDtos = new LinkedHashSet<>();
        if(CollectionUtil.isNotEmpty(ids)){
            for (Long id : ids) {
                MenuDto menuDto = menuService.findById(id);
                List<MenuDto> menuDtoList = menuService.getSuperior(menuDto, new ArrayList<>());
                for(MenuDto menu : menuDtoList){
                    if(menu.getId().equals(menuDto.getPid())){
                        menu.setSubCount(menu.getSubCount()-1);
                    }
                }
                menuDtos.addAll(menuDtoList);
            }
            //编辑菜单时不显示自己以及自己下级的数据，避免出现PID数据环形问题
            menuDtos=menuDtos.stream().filter(i->!ids.contains(i.getId())).collect(Collectors.toSet());
            return new ResponseEntity<>(menuService.buildTree(new ArrayList<>(menuDtos)),HttpStatus.OK);
        }
        return new ResponseEntity<>(menuService.getMenus(null),HttpStatus.OK);
    }

    @Log("新增菜单")
    @PostMapping
    @PreAuthorize("@el.check('menu:add')")
    public ResponseEntity<Object> createMenu(@Validated @RequestBody Menu resources){
        if(resources.getId()!=null){
            throw new BadRequestException("A new "+ ENTITY_NAME +" cannot already have an ID");
        }
        menuService.create(resources);
        return new ResponseEntity<>(HttpStatus.CREATED);
    }

    @Log("修改菜单")
    @PutMapping
    @PreAuthorize("@el.check('menu:edit')")
    public ResponseEntity<Object> updateMenu(@Validated(Menu.Update.class) @RequestBody Menu resources){
        menuService.update(resources);
        return new ResponseEntity<>(HttpStatus.NO_CONTENT);
    }

    @Log("删除菜单")
    @DeleteMapping
    @PreAuthorize("@el.check('menu:del')")
    public ResponseEntity<Object> deleteMenu(@RequestBody Set<Long> ids){
        Set<Menu> menuSet = new HashSet<>();
        for(Long id : ids){
            List<MenuDto> menuList = menuService.getMenus(id);
            menuSet.add(menuService.findOne(id));
            menuSet=menuService.getChildMenus(menuMapper.toEntity(menuList),menuSet);
        }
        menuService.delete(menuSet);
        return new ResponseEntity<>(HttpStatus.OK);
    }

}
